This adds a unit test for real mode emulation of the iret instruction
Signed-off-by: Mohammed Gamal <m.gamal...@gmail.com>
---
kvm/test/x86/realmode.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/kvm/test/x86/realmode.c b/kvm/test/x86/realmode.c
index bd79348..16716cc 100644
--- a/kvm/test/x86/realmode.c
+++ b/kvm/test/x86/realmode.c
@@ -865,6 +865,28 @@ void test_pusha_popa()
print_serial("Pusha/Popa Test2: PASS\n");
}
+void test_iret()
+{
+ struct regs inregs = { 0 }, outregs;
+
+ MK_INSN(iret, "pushf\n\t"
+ "pushl %cs\n\t"
+ "call 1f\n\t" /* a near call will push eip onto the stack
*/
+ "jmp 2f\n\t"
+ "1:iret\n\t"
+ "2:\n\t"
+ );
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_iret,
+ insn_iret_end - insn_iret);
+
+ if (!regs_equal(&inregs, &outregs, 0))
+ print_serial("iret Test 1: FAIL\n");
+ else
+ print_serial("iret Test 1: PASS\n");
+}
+
void realmode_start(void)
{
test_null();
@@ -886,6 +908,7 @@ void realmode_start(void)
/* long jmp test uses call near so test it after testing call */
test_long_jmp();
test_xchg();
+ test_iret();
exit(0);
}
--
1.7.0.4
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